VIBRATIONAL SPECTROSCOPIC AND THERMAL INVESTIGATIONS OF THE CYANO-BRIDGED POLYMERIC COMPLEXES WITH 3-AMINOMETHYLPYRIDINE

Year 2019, Volume: 20 Issue: 3, 216 - 226, 26.09.2019

Dursun Karaağaç

https://doi.org/10.18038/estubtda.624414

Cited By: 2

Abstract

New cyano-bridged
polymeric complexes formulated as [Co(H₂O)(ampy)Ni(CN)₄]∙H₂O
and [Ni(ampy)₂Ni(CN)₄]∙H₂O (ampy = 3-aminomethylpyridine: abbreviated henceforth as Co-Ni-ampy and Ni-Ni-ampy) have been
obtained in powder form and characterized by vibrational (infrared and Raman)
spectroscopy, thermal and elemental analyses. In previous study, structure of
complex [Cd(NH₃)(ampy)Ni(CN)₄]_n
(Cd-Ni-ampy) was determined by single crystal X-ray diffraction methods. In
this complex, the coordination environment of the Cd(II) ions are distorted
octahedral geometry, whereas around the Ni(II) center is pyramidal. The
spectral features suggest that Cd-Ni-ampy with Co-Ni-ampy are similar to each
other and the ampy ligand is coordinated to metal ions as bidentate ligand. In
addition, complex Ni-Ni-ampy is similar in structure to the Hofmann type
complexes and its structure consists of polymeric layers of │Ni–Ni(CN)₄│_∞
with the ampy ligand bounded to the nickel(II) atom. Thermal stabilities and
decomposition products of the complexes were investigated using TG, DTG and DTA
curves in the temperature range of 30 – 700 °C in the static air atmosphere.

Keywords

Vibrational spectra, Tetracyanonickelate(II), 3-aminomethylpyridine, Cyano-bridged complexes, Pyramidal

Supporting Institution

This work was supported by the Research Fund of Eskişehir Osmangazi University

Project Number

Project number: 201219024

Thanks

I would like to thank Prof. Dr. Güneş Süheyla Kürkçüoğlu for his support in writing of this article.

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